*{
    padding: 0;
    margin: 0;
    list-style: none;
    text-decoration: none;
    box-sizing: border-box;
}
.box{
    width: 800px;
    min-height: 300px;
    margin: 30px auto 0;
    border: 1px solid #ccc;
}
h2{
    font-size: 20px;
    line-height: 50px;
    font-family: '楷体';
    margin: 0 10px;
}
button{
    margin: 10px;
    border: none;
    color: white;
    width: 60px;
    height: 30px;
}
.add{
    background-color: rgb(16,108,200);
}
.remove{
    background-color: rgb(255,87,34);
}
.content{
    display: flex;
    flex-wrap: wrap;
}
.tag{
    background-color: rgb(0,150,136);
    font-size: 14px;
    padding: 5px;
    margin: 10px;
    color: white;
    cursor: pointer;
}
span{
    margin: 5px;
    color: black;
}
